WASHINGTON (AP) — Obama administration officials say a Dallas health care worker who handled a lab specimen from an Ebola-infected man from Liberia who died of the disease is on a Caribbean cruise ship where she has self-quarantined and is being monitored for any signs of infection.

State Department spokeswoman Jen Psaki (SAH'-kee) says in a statement Friday that the woman has shown no signs of the disease and has been asymptomatic for 19 days.

The government is working to return the woman and her husband to the U.S. before the ship completes its cruise. The White House says the State Department is working with an unidentified country to secure their transportation home.

Psaki says that when the woman left the U.S. on the cruise ship health officials were requiring only self-monitoring.